banq 2004-08-13 14:52 大杯 中杯是抽象,不加奶是行为,这两者可以有机结合: CoffeeImpSingleton coffeeImpSingleton = new CoffeeImpSingleton(new FragrantCoffeeImp());//指定了Singleton中使用不加奶行为SuperSizeCoffee superSizeCoffee = new SuperSizeCoffee();superSizeCoffee.pourCoffee();